I’m running a full 5.2.4 Atmos setup with 9 A’diva’s (way back I started with 5 Micros) … it does make a difference but I’d add the A’diva’s incrementally rather than all at once, ie get 2 (or 3) for the L(C)R first & then get a second subwoofer before going all A’diva … after the second sub, you might be interested in going 5.2.4 or 7.2.4 (ie a new AVR if your present one doesn’t do 4 height channels).